Stop mechanism for steam-engines



2 Sheets-Sheet 1.

(NoModeL) W M WOO D STOP MECHANISM FOR STEAM ENGINES.

Patentp'd May 16, 1893.

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(No Model.) 2 Sheets-Sheet 2.

v W. M. WOOD. v STOP MECHANISM FOR STEAM ENGINES. No; 497,529. Patented May 16, 1893.

A TTORNEKS UNITED STATES PATENT ()FFICE.

WILLIAM M. \VO l'), OF ELMIRA, NElv YORK.

STOP MECHANISM FOR STEAM-ENGINES.

SPECIFICATION forming part of Letters Patent No. 497,529, dated May 16, 1893. Application filed June 20, 1892. Serial No. 437,260. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM M. W001), of Elmira, in the county of Chemung, in the State of New York, have invented new and useful Improvements in Stop Mechanism for Steam-Engines,of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

My invention relates to' stop mechanism for steam engines, and particularly to that class in which either the throttle valve is antomatically closed by the tripping of a weight supporting meehanisn1,connected to the valve lever, and in which a friction brake is simultaneously applied to the main line or other shaft; and in which the valve only is closed; said trip being tripped either by an electromagnet connected to the trip lever, or by a motor connected thereto; or by a cord connected to it and extending to different parts of the building, with suitable pulls, connected to the cord, or a push button connected to the electro-magnet, or to the motor when electricity is used; said motor being either an electric motor; or a geared and spring actuated one; and by which whole mechanism the steam can be shut elf and the engine stopped from any part of the shop, as in case of an accident, and saving the time and delay usu ally necessary to notify the engineer and for him to stop the engine.

My invention consists in the several novel features of construction and operation hereinafter described and which are specifically set forth in the claims hereto annexed. It is constructed as follows, reference being had to the accompanying drawings, in which- Figure 1, is a side elevation of my invention applied to a lever connected to the stem of a valve and adapted to rotate it part way to open or close it, said valve being mounted in the steam induction pipe of the cylinder of an engine. Fig. 2, isa plan perspective of apulley upon ashaft, and a friction brake connected to and set by the valve tripping mechanism. Fig. 3, is a plan perspective of my tripping mechanism connected to a clutch mechanism in engagement with a drive-pulley loose upon a shaft, and also to a frictionbrake-pulley upon the same shaft, and also connected to a motor. Fig. 4, is an elevation of my trip mechanism connected to a drum upon the stem of the valve in the induction pipe connected to a steam-chest. Fig. 5, is a viewof an engagementof multiple hand pulls connected to the trip mechanism, by either of which it can be operated.

A, is part of an engine frame, and ais a cylinder mounted thereon, and bis the steam induction pipe, provided with a valve, upon the stem of which a lever b' b'- is secured and by which the valve, by semi-rotation, is opened or closed. A cord c is connected to said lever, passes over a pulley c' and carries a weight c"-. This cord is also connected to a lever d, provided with a latch-pawl dadapted to engage with a pin d upon the pivotally mounted dog -e, to which the cord e is connected, and which passes over the pullies ef'and is connected to the leverh and also carries the weight e as shown. This lever is provided with a pin h' with which one arm of the angular lever h" engages in such a manner that said lever being pivoted at the angle, its other arm is held down upon the stop pin k by the weight e or else is so held by afragile or easily broken cord h (Fig. 5). A cord mleads from the latter arm of the lever h over the drum m' mounted in the motor --B and rotated by the spring actuated train of clock-work gearing, which is also adapted to sound an alarm upon the gong m" whenever said gearing is released from the dog nconnected to the armature of the electro-magnet n' from which the wires -n" and n' lead to the bat- -tery J, a circuit-closing push button 1' being mounted upon the wire n"--.

In Fig. 2 a slack chain 2 is connected to the weight e" and to a crank lever 3 pivoted upon a swinging frame 4 to which one end of the friction brake band -5- is connected, the other end of said lever being connected by a link to the other end of said band -5-, so that when said weight is released it will exert a pull upon both ends of said band, to grip it around the pulley 6 mounted upon the shaft -7. In Fig. 3 I also show a loose drive pulley wmounted upon said shaft, and -8 is an ordinary clutch mechanism adapted to engage with said pulley to rotate said shaft;

' upon said leveradapted to engage with a dog,

and a lever --:r-- connected to said clutch and a cord connected to said lever and leading to the weight e" and connected to the lever -h.

In Fig. 4 I show the cord -cwound around a drum 9- upon the valvestem, and a band-wheel -10- secured upon said valve-stem.

In Fig. 5, 11 and 12 represent two floors of a building, and the cord eled along or supported from the ceilings by pulleys or other suitable supports -13, hand pulls 14-: being also connected to the cord, in such positions as maybe most convenient for thereby operating the trip mechanism from any part of either fioor.

\Vhat I claim as my invention, and desire to secure by Letters Patent, is-

1. A stop mechanism comprising a steam engine cylinder, an induction pipe, a valve therein a cord operatively connected to rotate said valve to close it,a weight upon said cord, a lever to which the cord is connected, a pawl and means to disengage said pawl, in combination as set forth.

2. stop mechanism comprising a steam engine cylinder, an induction pipe, a valve therein, a cord operatively connected to 1'0- tate said valve to close it, a weight upon said cord, a lever to which the cord is connected, a pawl upon said lever adapted to engage with a dog, a cord connected to said dog, and leading to a lever and a weight carried thereby, an angular lever engaging with the other lever, a cord leading from the angular lever to a motor, and means to'actuate said motor in combination as set forth.

3. A stop mechanism comprising a steam engine cylinder, an induction pipe, a Valve therein, a cord operatively connected to rotate said valve to close it, a weight upon said cord, a lever to which the cord is connected, a pawl upon said lever adapted to engage with a dog, a cord connected to said dog, and leading to a leverand a weight carried thereby, an angular lever engaging with the other lover, a cord leading from the angular lever to a motor, and means to actuate said motor, a friction brake, and a pulley clutch operatively connected to the mechanisms hereinbefore specified, in combination as set forth. In witness whereof I have hereunto set my hand this 9th day of June, 1892.

WILLIAM M. WOOD. In presence of WILLIAM II. LONGSTREET, JOHN C. GALLAGHER. 

